4 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/hci.h b/drivers/net/wireless/realtek/rtw88/hci.h
index 3d91aea942c3..85a81a578fd5 100644
--- a/drivers/net/wireless/realtek/rtw88/hci.h
+++ b/drivers/net/wireless/realtek/rtw88/hci.h
@@ -15,6 +15,7 @@ struct rtw_hci_ops {
 	void (*stop)(struct rtw_dev *rtwdev);
 	void (*deep_ps)(struct rtw_dev *rtwdev, bool enter);
 	void (*link_ps)(struct rtw_dev *rtwdev, bool enter);
+	void (*interface_cfg)(struct rtw_dev *rtwdev);
 
 	int (*write_data_rsvd_page)(struct rtw_dev *rtwdev, u8 *buf, u32 size);
 	int (*write_data_h2c)(struct rtw_dev *rtwdev, u8 *buf, u32 size);
@@ -59,6 +60,11 @@ static inline void rtw_hci_link_ps(struct rtw_dev *rtwdev, bool enter)
 	rtwdev->hci.ops->link_ps(rtwdev, enter);
 }
 
+static inline void rtw_hci_interface_cfg(struct rtw_dev *rtwdev)
+{
+	rtwdev->hci.ops->interface_cfg(rtwdev);
+}
+
 static inline int
 rtw_hci_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf, u32 size)
 {
diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c
index 507970387b2a..03a82de053ea 100644
--- a/drivers/net/wireless/realtek/rtw88/mac.c
+++ b/drivers/net/wireless/realtek/rtw88/mac.c
@@ -1034,5 +1034,7 @@ int rtw_mac_init(struct rtw_dev *rtwdev)
 	if (ret)
 		return ret;
 
+	rtw_hci_interface_cfg(rtwdev);
+
 	return 0;
 }
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index c394df494c95..a60d9b107006 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -6,6 +6,7 @@
 #include <linux/pci.h>
 #include "main.h"
 #include "pci.h"
+#include "reg.h"
 #include "tx.h"
 #include "rx.h"
 #include "fw.h"
@@ -1224,6 +1225,21 @@ static void rtw_pci_link_cfg(struct rtw_dev *rtwdev)
 	rtwpci->link_ctrl = link_ctrl;
 }
 
+static void rtw_pci_interface_cfg(struct rtw_dev *rtwdev)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+
+	switch (chip->id) {
+	case RTW_CHIP_TYPE_8822C:
+		if (rtwdev->hal.cut_version >= RTW_CHIP_VER_CUT_D)
+			rtw_write32_mask(rtwdev, REG_HCI_MIX_CFG,
+					 BIT_PCIE_EMAC_PDN_AUX_TO_FAST_CLK, 1);
+		break;
+	default:
+		break;
+	}
+}
+
 static void rtw_pci_phy_cfg(struct rtw_dev *rtwdev)
 {
 	struct rtw_chip_info *chip = rtwdev->chip;
@@ -1332,6 +1348,7 @@ static struct rtw_hci_ops rtw_pci_ops = {
 	.stop = rtw_pci_stop,
 	.deep_ps = rtw_pci_deep_ps,
 	.link_ps = rtw_pci_link_ps,
+	.interface_cfg = rtw_pci_interface_cfg,
 
 	.read8 = rtw_pci_read8,
 	.read16 = rtw_pci_read16,
diff --git a/drivers/net/wireless/realtek/rtw88/reg.h b/drivers/net/wireless/realtek/rtw88/reg.h
index 7e817bc997eb..cd6b14c379ba 100644
--- a/drivers/net/wireless/realtek/rtw88/reg.h
+++ b/drivers/net/wireless/realtek/rtw88/reg.h
@@ -194,6 +194,8 @@
 #define REG_H2C_INFO		0x0254
 
 #define REG_INT_MIG		0x0304
+#define REG_HCI_MIX_CFG		0x03FC
+#define BIT_PCIE_EMAC_PDN_AUX_TO_FAST_CLK BIT(26)
 
 #define REG_FWHW_TXQ_CTRL	0x0420
 #define BIT_EN_BCNQ_DL		BIT(22)